GB2313446A - Position detection devices - Google Patents

Position detection devices

Info

Publication number
GB2313446A
GB2313446A GB9717231A GB9717231A GB2313446A GB 2313446 A GB2313446 A GB 2313446A GB 9717231 A GB9717231 A GB 9717231A GB 9717231 A GB9717231 A GB 9717231A GB 2313446 A GB2313446 A GB 2313446A
Authority
GB
United Kingdom
Prior art keywords
position detection
magnet
magnet poles
detection device
predetermined direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9717231A
Other versions
GB2313446B (en
GB9717231D0 (en
Inventor
Kenneth Stephen Evans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baroid Technology Inc
Original Assignee
Baroid Technology Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9504151.3A external-priority patent/GB9504151D0/en
Application filed by Baroid Technology Inc filed Critical Baroid Technology Inc
Priority to GB9717231A priority Critical patent/GB2313446B/en
Publication of GB9717231D0 publication Critical patent/GB9717231D0/en
Publication of GB2313446A publication Critical patent/GB2313446A/en
Application granted granted Critical
Publication of GB2313446B publication Critical patent/GB2313446B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/024—Determining slope or direction of devices in the borehole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
    • E21B47/092—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting magnetic anomalies

Abstract

A position detection device for detecting the position of adjustable stabilizer blades (3) in a bottomhole assembly of a drill string (2) within a borehole comprises a variable reluctance magnetic circuit incorporating an inner magnet member (7) and a outer magnetisable member (4) which are movable relative to one another along a predetermined direction (5) between two states in which the reluctance of the magnetic circuit differs due to the differing relative positions of the inner and outer members (7, 4). The inner member (7) includes a detector (8) comprising a permanent magnet (9) having magnet poles oriented so as to provide a magnetic field having a portion extending transversely of the predetermined direction (5), and a magnetoresistive flux sensor (15) having a sensing axis (17) oriented relative to the magnet poles so as to provide an output indicative of the angle between the sensed flux in the vicinity of one of the magnet poles and the sensing axis (17) and dependent on the relative positions of the inner and outer members (7, 4). Such a novel position detection device provides a positive indication of the position of the stabiliser blades in such an application.
GB9717231A 1995-03-02 1996-02-29 Position detection devices Expired - Fee Related GB2313446B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9717231A GB2313446B (en) 1995-03-02 1996-02-29 Position detection devices

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9504151.3A GB9504151D0 (en) 1995-03-02 1995-03-02 Position detection devices
GB9717231A GB2313446B (en) 1995-03-02 1996-02-29 Position detection devices
PCT/GB1996/000444 WO1996027068A1 (en) 1995-03-02 1996-02-29 Position detection devices

Publications (3)

Publication Number Publication Date
GB9717231D0 GB9717231D0 (en) 1997-10-22
GB2313446A true GB2313446A (en) 1997-11-26
GB2313446B GB2313446B (en) 1999-05-12

Family

ID=26306605

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9717231A Expired - Fee Related GB2313446B (en) 1995-03-02 1996-02-29 Position detection devices

Country Status (1)

Country Link
GB (1) GB2313446B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2108678A (en) * 1981-10-17 1983-05-18 Armstrong Patents Co Ltd Shock absorber or ram position sensing system
US4719419A (en) * 1985-07-15 1988-01-12 Harris Graphics Corporation Apparatus for detecting a rotary position of a shaft
GB2211297A (en) * 1987-10-16 1989-06-28 Bochumer Eisen Heintzmann A pressure sensor
EP0594419A1 (en) * 1992-10-23 1994-04-27 Halliburton Company Adjustable blade stabilizer for drilling system
US5311953A (en) * 1992-08-07 1994-05-17 Baroid Technology, Inc. Drill bit steering
EP0629834A1 (en) * 1992-03-02 1994-12-21 Seiko Epson Corporation Displacement sensor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2108678A (en) * 1981-10-17 1983-05-18 Armstrong Patents Co Ltd Shock absorber or ram position sensing system
US4719419A (en) * 1985-07-15 1988-01-12 Harris Graphics Corporation Apparatus for detecting a rotary position of a shaft
GB2211297A (en) * 1987-10-16 1989-06-28 Bochumer Eisen Heintzmann A pressure sensor
EP0629834A1 (en) * 1992-03-02 1994-12-21 Seiko Epson Corporation Displacement sensor
US5311953A (en) * 1992-08-07 1994-05-17 Baroid Technology, Inc. Drill bit steering
EP0594419A1 (en) * 1992-10-23 1994-04-27 Halliburton Company Adjustable blade stabilizer for drilling system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Non-contact analog rotary position sensor" *
IBM Technical Disclosure Bulletin, July 1984, USA Vol.27, No.2, page 1195, Griffing B.M,, *

Also Published As

Publication number Publication date
GB2313446B (en) 1999-05-12
GB9717231D0 (en) 1997-10-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000229